Date: Fri, 25 May 2007 14:10:04 -0400 From: Joe Marcus Clarke <marcus@marcuscom.com> To: Attilio Rao <attilio@freebsd.org> Cc: Jeff Roberson <jroberson@chesapeake.net>, Current@freebsd.org Subject: Re: Panic on -CURRENT after LDT changes Message-ID: <4657267C.2070306@marcuscom.com> In-Reply-To: <3bbf2fe10705240930o10f37febt9fb5f0a46bd193c3@mail.gmail.com> References: <1179962663.75721.6.camel@shumai.marcuscom.com> <20070523165051.G9443@10.0.0.1> <4655D5C1.2010905@FreeBSD.org> <1180022919.10757.24.camel@shumai.marcuscom.com> <3bbf2fe10705240930o10f37febt9fb5f0a46bd193c3@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Attilio Rao wrote: > 2007/5/24, Joe Marcus Clarke <marcus@marcuscom.com>: >> On Thu, 2007-05-24 at 20:13 +0200, Attilio Rao wrote: >> > Jeff Roberson wrote: >> > > Thanks, Attilio and I will look at this right away. >> > > >> > > Jeff >> > > >> > > On Wed, 23 May 2007, Joe Marcus Clarke wrote: >> > > >> > >> On a -CURRENT build today with Jeff's LDT locking changes, I get an >> > >> instant, reproducible panic by doing: >> > >> >> > >> # cd /usr/src >> > >> # make -DNO_CLEAN buildworld >> > >> >> > >> Backing out the LDT changes to /sys/i386/i386/*machdep* corrects the >> > >> problem. Here is a dmesg and backtrace. In frame 6, it appears >> mdp is >> > >> NULL (i.e. td->td_proc->p_md = 0x0). >> > >> > Did you enable WITNESS/INVARIANTS/INVARIANT_SUPPORT? >> >> No, this kernel does not have WITNESS or INVARIANTS. I can enable those >> tomorrow if that would give you more useful information. > > It would be very appreciated, since I've been unable to reproduce your > panic on a centrino dual core. I'm stopped in the debugger now with WITNESS and friends enabled. Same backtrace as before. I did a "show locks" and I see: exclusive spin mutex descriptor tables r = 0 (0xc08369f8) locked @ /usr/src/sys/i386/i386/sys_machdep.c:629 Please let me know what else you'd like to see while I'm at the debugger. FYI: this is a Pentium 4 with "options SMP" disabled. Joe - -- PGP Key : http://www.marcuscom.com/pgp.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFGVyZ8b2iPiv4Uz4cRAmMEAJwK6LoqXTtiA/XxD/IhsWxgIaJLNgCgj0iI wRRxfWOA+k3VV678FIJ4Vxs= =rvhj -----END PGP SIGNATURE-----
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4657267C.2070306>